Necticut



(No Model.)

"No..seelsm P. H. RICHARDS.

SHEAEING MEQHANISM.

` Patented July 5, 1387.

Unirse Srarns.

Farmer Ormea.

FRANCIS I-I. RICHARDS,f OF SPRINGFIELD, MASSACHUSETTS, ASSIGNOR OF ONE-HALF TO THE PRATT & VHITNEY COMPANY, OF HARTFORD, CON- NECTICUT.

SPECIFICATION forming part of Letters Patent No. 366,187, dated duly 5, 1887.

Application filed Novemherl, 1886. Serial No. 218,870. (No model.)

To all whom may concern:

Be it known that I, FRANCIS H. RICHARDS, a citizen of the United States, residing at Spring- Iield, in the county of Hampden and State of Massachusetts, have invented certain new and useful Improvements in Shearing Mechanism, of which the following is a specification.

This invention relates to mechanism for cuttingstri ps of sheet materials-ms, for instance,

1o cutting ofi' the envelope-bands in envelopemachines-the object being to furnish a simple and4 efficient shearing apparatus in which two shear-blades shall be similarly but oppositely operated from one actuating device.

r To this end the invention consists in the combinations hereinafter described and claimed.

In the drawings accompanying and forming a part of this specication, Figure 1 is an end elevation, partially in section, of a shearing 2O mechanism embodying my improvements. Fig. 2 is a front elevation of the same drawn in project-ion with Fig. 1.

Similar characters designate like parts in both the figures.

2 5 The framework carrying the several operative parts may be constructed in .anysuitable manner, or it lnay constitute, also, the frame of some other machine, to which this apparatus is attached. Asshown in the drawgo ings, same frame work comprises the table 2, uprights 3 and 4, and the post 5. The table has a bearing for a slide, 7, which is operated by a cam, (or, it may be, by an eccentric,) 8, on shaft 9. In practice the cam acts on a roller, 10, turning on a pin, 11, fixed in said slide, this being moved down by a suitable spring, as 12, acting between the slide and some part of the frame. The roller may, however, bc omitted, the slide resting directly on 4o the cam; also, the spring may be omitted and the cam constructed to move the slide in both directions ina well-known manner. The eamshaft 9 is supposed to be revolved as may be required by means of a pulley or some other mechanical device not shown. The two similar shear-blades 16 18 are pivotally supported on a stud, 19, lined in `post 5. Blade 16 has an arm, 17, extending beyond said stud to carry the pin 20, the opposite pin, 21, being xed in blade 18. These two pins 2() 2l are 5o respectively connected to the slide lby oppo sitely-disposed rods or connections, whereby any movement of said slide operates the blades in opposite directions. These rods, designated by 22 and 21, are preferably arranged 55 as shown, being connected, respectively, to the aforesaid pins 20 21 and both to the pin 23 in the slide. By this arrangement a downward movement of the slide opens the blades, and vice versa. 6o

The material lo bc cnt F, Fig. 2, is (or may be) fed to the shears by feedlrolls, as 30 32, carried on studs fixed in post 5 and suitably operated by devices not shown.

This shearing mechanism is in the nature of an improvement on the similar apparatus embodied inthe mechanism shown and described in my application No. 191,885, tiled February 13, 1886.

'It should be understood that my improved 7o shearing mechanism, and especially the dctails thereof, are capable of modilication in various ways and degrees, after the manner of machines in general, without departing from my invention.

Having thus described my invention, I claim- 1. The combination, in a shearing mechanism, of a pair of blades pivot-ally supported, a suitably actuated slide, and oppositely dis- 8o posed connections f rom said slide to said blades, substantially as set forth.

2. The combination of blade 16, having pin 20, blade 18, having pin 21, slide 7, rod 22, connected to said slide and to pin 20, and rod S5 2i, connected to said slide and pin 2l, ali substantially as set forth.

renners H. nronninns.

X'Vitnesses:

Gno. W. Daarin, Winnen M. STONE. 

